Name:el Mensah Univrsity Physics II - PHYS 2326 Test 2 November 6, 2017 1) An el

Question

Name:el Mensah Univrsity Physics II - PHYS 2326 Test 2 November 6, 2017 1) An electron is moved along an equipotential line in a uniform electric field The electric potential energy of the electron a) increases b) decreases c) oscillates d) does not change A uniform electric field is vertical. electric field lines are 2) Equipotential lines associated with the a) vertical b) horizontal c) non existent d) curved If the distance between the plates of a parallel plate capacitor is doubled, the capacitance of the capacitor is 3) a) halved b) doubled c) quadrupled d) remains the same 4) How much charge is transferred in 10 seconds in a wire with 20 A? A resistor and battery are connected. What is the resistor if the battery has a potential of 10 V and the resistor has a resistance of 5 ? 5) current through the What is the power dissipated in a 10 resistor that has a current passing through it of 2 A? 6)

Explanation / Answer

1. delta(PE) = q (deltaV)

delta(V) = 0 => delta(PE) = constant

Ans(d)

2. both lines are perpendicular.

Ans: (b)Horizontal

3. C = e0 A / d

(A) halved

4. Q = I t = 200 C

5. I = 10/5 = 2 A

6. P = I^2 R = 40 W

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